The Nation

A toxic chemical stored improperly aboard an American Airlines jet heated up the floor and spread fumes through the cabin, injuring at least 12 people, an airline spokeswoman said. The 119 passengers on the Dallas-to-Nashville flight evacuated the MD-80 jet by emergency chutes upon landing, said American spokeswoman Susan Robbins. Twelve people were treated for smoke inhalation, and four were admitted, two in serious condition, to a Nashville hospital. Robbins did not identify the chemical.